TABLE 3

Selected Characteristics Among Children With Influenza-Associated Mortality by Presence of High-Risk Medical Conditions: United States, October 2004 Through September 2012

CharacteristicNo High-Risk Medical Conditions, (n = 341)One or More High-Risk Medical Condition, (n = 453)PRR (95% CI)
Age, median (IQR)a, y5 (1–11)8 (3–13)<.001
Age <5 years152/341 (45)154/453 (34)1.3 (1.1–1.6)
Died before being admitted to hospitalb156/339 (46)106/449 (24)1.9 (1.6–2.4)
Duration of illness ≤3 days136/326 (42)113/438 (26)1.6 (1.3–2.0)
One or more bacterial pathogen identified from normally sterile site86/155 (55)63/222 (28)2.0 (1.5–2.5)
Type of complication
 Pneumonia130/320 (41)249/426 (58)0.7 (0.6–0.8)
 Acute respiratory distress syndrome82/320 (26)148/426 (35)0.7 (0.6–0.9)
 Shock or sepsis104/320 (33)97/426 (23)1.4 (1.1–1.8)
  • Data are presented as n (%) unless otherwise indicated. IQR, interquartile range.

  • a Died in emergency department or outside of hospital.